On December 5, 2017, the Federal Circuit held oral argument in Momenta Pharmaceuticals, Inc. v. Bristol-Myers Squibb Company, 17-1694. The case comes on appeal from an IPR decision where the Board declined to find U.S. Patent No. 8,476,239 (“the ʼ239 patent”) unpatentable as obvious. The ʼ239 patent covers Bristol-Myers Squibb’s (“BMS”) Orencia® product, a